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I found this specimen last summer in the St. Paul Stone Quarry in St. Paul, Indiana. I think this site is Silurian. The oval on the left is 1.5 x 8 cm. The one on the top is 4 x 10 cm. Lots of smaller ones. They're flat, not raised. Any idea what they are?

My son found this in the Mississippi River in St. Paul, MN. I thought maybe it was a scapula, but I really have no idea. Anyone out there know what it is? Thanks!

This report is of my first trip into the St. Paul, IN quarry and my first time to collect (extensively) from the Waldron Shale. Previously I have collected the Waldron Shale at the Tunnel Mill site a little farther south but that is not very easy to collect from and the exposure is not as extensive as at the St. Paul Quarry. It was a 9 1/2 hour drive from my house near Philadelphia, PA to Greensburg, IN where I was staying so I had driven out the day before the quarry was to open. I stopped at the St. Leon (South Gate Hill) roadcut, as I got into Indiana, and did have some luck finding some small roller Flexicalymene trilobites. "This is a good sign" I told myself! The morning dawned when my alarm went off around 6am. The Quarry would start letting people in around 7:30 so I wanted to be there early to avoid any crowds or lines. Also, collectors were only allowed in the quarry until noon and I was going to make the most of my time! I arrived at the scale house around 6:45 and there was one car already waiting near the entrance. Before long a few more showed up and then a couple of Quarry employees opened the gate. After signing in, I was in the first group of cars to drive into the quarry. After a quick orientation and explanation of where we could and could not collect, there were four possible areas, we set off towards an area that had experienced some extensive weathering. As I had never collected this quarry before I was not sure what to expect so I wanted to look through rock that was weathered and maybe had some loose fossils. We got to the area after a short drive, it was at the top of the quarry and overlooked the pit itself. We were allowed to collect along the berm edge but we could not climb on or over the berm itself. It was for our safety and seemed reasonable as there was quite a lot of rock to look at along the base of the berm and the ground. The rock was already broken up and had been removed as a byproduct of the quarry operations. They wanted the limestone, not the softer shale.